Improvement in farmers  boilers



A. B. NOTT.

Farmers Boilers.

Patented Jan. 21, i873.

AARON B. NOTT, OF FAIRHAYEN, MASSACHUSETTS, ASSIGNOR ONE- HALF HIS RIGHTTO JAMES E. CARD, OF SAME PLACE.

'IMPROVEMENT IN FARMERS BOILERS.

Specification forming part of Letters Patent No. 135,005, dated January21, 1673.

To all whom it may concern:

Be it known that I, AARON B. NOTT, of Fairhaven, in the. county ofBristol and State of Massachusetts, have invented an Improved FarmersBoiler; and I do hereby declare that the following is a full, clear, andexact description thereof, reference being had to the accompanyingdrawing making part of this specification, in which- Figure 1 is aperspective view of my improved boiler complete; Fig. 2 is a sectiontaken longitudinally and vertically through the center of the boiler;Fig. 3 is a top view of the lower section of the furnace and boilershell and Fig. 4 is a perspective view of the removable grate.

Similar letters of reference indicate corresponding parts in the severalfigures.

The object of this invention is to improve farmers boilers, so thateither wood or coal can be burned in their furnaces, as may be desired;at the same time to construct them that the flames and heated productsof combustion will be caused to circulate about the sides and bottom ofthe caldron; also, to provide for shortening vertically thefurnace-shell, and making it of two horizontally-divided parts, as willbe hereinafter explained.

The following description of my invention will enable others skilled inthe art to understand it.

In the accompanying drawing, it will be seen that the furnace forcontaining and supporting the caldron or boilerB is constructed of twohorizontally-divided sections, which are fitted together by a joint ati, and secured by several bolts or rivets. The lower and longest sectionconsists of an oblong upwardly-converging shell, A O, and a depressedash-pit, D, which latter extends from front to rear of the entirefurnaceshells, and is especially designed for use when wood is burned,and for another purpose hereinafter explained. The two portions A and Orepresent,'in a side view, two frustuins of cones united, the .portion Abeing the largest. The upper section, which is vertically shorter thanthe lower section, is of the same shape as the latter, and consists oftwo portions, A and G. The portion A is open at its top, and supportsthe caldron by means of a flange, as shown in Fig. 2. The portion 0,which is shorter vertically than the section A, is closed on top, excepta small feed-opening for coal, which opening is provided with a cover,0, shown in Figs. 1 and 2. The furnace-shell thus-constructed is of anoblong upwardly-tapering form, the front portion of which is verticallyshorter than that portion which receives into it the caldron B. Betweenthe two portions of this furnace I apply a division-plate orfire-bridge, J, the ends of which are received between flanges, whichsupport such plate in a vertical position and allow it to be removedfrom the furnace at pleasure. G represents a grate, consisting of ahorizontal semicircular portion and an upwardly-rising curved portion,which is designed for preventing the escape of coals through a frontdooropening whenthe doorsthereof areopened. This grate rests upon a ledgewhich is above the ash-pit D, and when desired it may be re moved fromthe fire-chamber. the ash-pit D is provided with a sliding door, N, forregulating the admission of air, and also for allowing the removal ofthe ashes. The doors to the front of the fire-chamber are so applied togrooved flanges b b that they can be opened or shut withalaterally-sliding move ment.

When coal is used as fuel the grate and fire-bridge are employed, asshown in Fig. 2, and the coal is supplied to the fire-chamber throughthe opening which is through the top of this chamber. When it isnecessary or desirable to use wood as fuel the grate and also thefire-bridge J are removed from the firechamber so as to leave the entireheating-space free for receiving large logs that may extend the entirelength of the ash-pit D, thus rendering unnecessary the use of shortwood.

It will be seen from the foregoing description that the body furnace iscomposed of only two pieces united by a horizontal joint and bolts orrivets, which sections are larger attheir base than they are at theirupper end, for the purpose of affording plenty of space for fuel andexpansion of the products of combustion.

On opposite sides of the portions A A are arranged two deflecting orinterrupting plates, 9 g, which rise from the base of A to the upperedge of A, and are designed for preventin g the heated products frompassing directly ATENT OFFICE.

The front of from the space above the fire-bridge to the esand puttogether as herein described and cape-pipe 0. By means of these plates g9 shown. the products are caused to descend beneath 2. The combinationof the depressed ashand heat the bottom of the caldron B, then pit D andsections A O A C with the removrise and escape through the pipe 0, thusheatable caldron B, and removable grate G, and ing the entire'surface ofthe caldron. the removable fire-bridge J all substantially Havingdescribed my invention, What I as described. claim as new, and desire tosecure by Letters AARON B. NOTT. Patent, is- Witnesses:

l. The horizontally-divided and upwardly- HENRY L. CARD, taperedsections A G and A O, constructed I. F. TERRY.

